L5991 Datasheet, PDF (4/19 Pages) STMicroelectronics – PRIMARY CONTROLLER WITH STANDBY

L5991 - L5991A
ELECTRICAL CHARACTERISTICS (continued.)
Symbol
Parameter
OUTPUT SECTION
Fall Time
Rise Time
UVLO Saturation
SUPPLY SECTION
V_CCON
Startup voltage
VCCOFF Minimum Operating Voltage
V_{h ys}
UVLO Hysteresis
I_S
Start Up Current
I_op
Operating Current
I_q
Quiescent Current
V_Z
Zener Voltage
STANDBY FUNCTION
V_REF-V_ST-BY
V_T1
Standby Threshold
SYNCHRONIZATION SECTION
V1
Clock Amplitude
I₁
Clock Source Current
V₁
Sync Pulse
I₁
Sync Pulse Current
OVER CURRENT PROTECTION
V_t
Fault Threshold Voltage
DISABLE SECTION
Shutdown threshold
I_SH
Shutdown Current
Test Condition
Min.
C_O = 1nF
C_O = 2.5nF
C_O = 1nF
C_O = 2.5nF
VCC = V_C = 0 to V_CCON
I_sink = 10mA
L5991 14
L5991A 7.8
L5991 9
L5991A 7
L5991 4.5
L5991A 0.5
Before Turn-on at:
40
VCC = V_C = V_CCON -0.5V
C_T = 1nF, R_T = 13.3kΩ, C_O =1nF
(After turn on), CT = 1nF,
R_T = 13.3kΩ, C_O =0nF
I₈ = 20mA
21
I_ST-BY = 2mA
V_comp Falling
V_comp Rising
Master Operation
ISOURCE = 0.8mA
4
Vclock = 3.5V
3
Slave Operation
Low Level
High Level
3.5
VSYNC = 3.5V
0.5
1.1
2.4
VCC = 15V
Typ.
20
35
50
70
15
8.4
10
7.6
5
0.8
75
9
7.0
25
45
2.5
4.0
7
1.2
2.5
330
Max.
60
100
1.0
16
9
11
8.2
120
13
10
30
1
1.3
2.6
Unit
ns
ns
ns
ns
V
V
V
V
V
V
V
µA
mA
mA
V
mV
V
V
V
mA
V
V
mA
V
V
µA
Figure 1. L5991 - Quiescent current vs. input
voltage.
(X = 7.6V and Y= 8.4V for L5991A)
Iq [mA]
30
20
V 14 = 0, P in2 = open
Tj = 2 5°C
8
6
4
0 .2
0 .1 5
0 .1
0 .0 5
X
Y
0
0
4
8 12 16 20 24 28
V cc [V ]
Figure 2. L5991 - Quiescent current vs. input
voltage (after disable).
(X = 7.6V and Y= 8.4V for L5991A)
Iq [µ A]
350
300
250
200
150
100
50
V 14 = Vref
T j = 25 °C
X
Y
0
0
4
8
12 16 20 24
V cc [V]
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